Migrate data_source_google_compute_region_instance_group to use trans…

[jcromanu]

…port_tpg.SendRequest

Release Note Template for Downstream PRs (will be copied)

See Write release notes for guidance.

compute: migrated `google_compute_region_instance_group` data source to use direct HTTP rather than a client library

[github-actions]

Googlers: For automatic test runs see go/terraform-auto-test-runs.

@roaks3, a repository maintainer, has been assigned to review your changes. If you have not received review feedback within 2 business days, please leave a comment on this PR asking them to take a look.

You can help make sure that review is quick by doing a self-review and by running impacted tests locally.

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

google provider: Diff ( 1 file changed, 54 insertions(+), 29 deletions(-))
google-beta provider: Diff ( 1 file changed, 54 insertions(+), 29 deletions(-))

[modular-magician]

Tests analytics

Total tests: 1407
Passed tests: 1310
Skipped tests: 90
Affected tests: 7

Click here to see the affected service packages

• compute

Action taken

Found 7 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

• TestAccComputeInstanceGroup_basic
• TestAccComputeInstanceGroup_outOfOrderInstances
• TestAccComputeInstanceGroup_rename
• TestAccComputeInstanceGroup_update
• TestAccComputeRegionBackendService_ilbUpdateFull
• TestAccComputeSharedReservation_update
• TestAccDataSourceGoogleComputeInstanceGroup_withNamedPort

Get to know how VCR tests work

[modular-magician]

🟢 Tests passed during RECORDING mode:
TestAccComputeSharedReservation_update [Debug log]

🟢 No issues found for passed tests after REPLAYING rerun.

---

🔴 Tests failed during RECORDING mode:
TestAccComputeInstanceGroup_basic [Error message] [Debug log]
TestAccComputeInstanceGroup_outOfOrderInstances [Error message] [Debug log]
TestAccComputeInstanceGroup_rename [Error message] [Debug log]
TestAccComputeInstanceGroup_update [Error message] [Debug log]
TestAccComputeRegionBackendService_ilbUpdateFull [Error message] [Debug log]
TestAccDataSourceGoogleComputeInstanceGroup_withNamedPort [Error message] [Debug log]

🔴 Errors occurred during RECORDING mode. Please fix them to complete your PR.

View the build log or the debug log for each test